Probably what they (China and Russia) will do... Also,they will try to use Iran, North Korea, and islamic terrorists to strike the first blow.
Also, both of those countries could smuggle in Nuclear cruise missles into Cuba, venesuelia, ect without our intel knowing about it.
We should play them at their own game. Arm Taiwan and Japan with nukes in retaliation for their arming Iran and North Korea. Arm undergroud Chinese opposition movenemts in retaliation for their use of Islamonazis to strike us.